iOS 截图屏幕

OC版本

- (UIImage*)screenSnapshot:(UIView *)view{
    UIGraphicsBeginImageContextWithOptions(view.frame.size, NO, 0);
    [view.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage * image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    UIImage * iii = [[UIImage alloc] initWithData: UIImageJPEGRepresentation(image, 0.8)];
    return iii;
}

swift版本

//截取屏幕
func screenSnapshot(view: UIView) -> UIImage? {
    
    UIGraphicsBeginImageContextWithOptions(view.frame.size, false, 0.0)
    view.layer.render(in: UIGraphicsGetCurrentContext()!)
    let image = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()
    //截取指定范围
    return UIImage.init(data: image?.jpegData(compressionQuality: 0.5) ?? Data()) //image
    
}


//截取整个屏幕

func screenSnapScreen() -> UIImage? {
  
    //截取整个屏幕
    guard let window = UIApplication.shared.keyWindow else { return nil }
    // 用下面这行而不是UIGraphicsBeginImageContext()，因为前者支持Retina
    UIGraphicsBeginImageContextWithOptions(window.bounds.size, false, 0.0)
    window.layer.render(in: UIGraphicsGetCurrentContext()!)
    let image = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()
   
    return UIImage.init(data: image?.jpegData(compressionQuality: 0.5) ?? Data()) //image
}